Roofer&#39;s slag scraper



Feb. 26, 1952 M. coNFoRTo RooFER's SLAG scRAPER 2 SHEETS-SHEET l Filed Dec. 5l, 1946 fra/emr.- clzae Coyorig,

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M. CONFORTO ROOFERS SLAG SCRAPER Feb.' 1952 2 SHEETS-SHEET 2 Filed Dec. 51, 1946 Patented F eb. 26, 1952 ROOFERS` SLAG SCRAPER Michael Conforto, Philadelphia, Pa. Application December 31, 1946, Serial No. 719,391

` Claims.

My invention relates to a new and useful roofers slag scraper and has for one of its objects to provide a, small, light weight machine that may be readily transported to a roof, as by a rope in the hands of a workingrnan or block and fall and the like, and then operated by one person for quickly and .easily scraping the material substances of an old slag roof from the base woodwork.

YAnother object of this invention is to provide power driven means for reciprocating a scraper blade, all mounted on a suitable running gear for movement over a roof or surface to be scraped.

Another object of the present invention is to provide a slide with which the scraper blade is connected which slide is partially housed and having means associated therewith to prevent dirt, dust and the like from entering the front of the housing.

A further object of the invention is to provide means for tilting the chassis whereby the scraper blade may be moved into contact with depressed portions of a roof even while the front wheels of the running gear of the machine are resting on rises in the roof surface.

At present slag rooves are scraped with hand tools similar to spades. This is very hard and diicult work requiring the services of strong men who can only work short periods at a time, resulting in considerable added expense to repair bills of this type. By the use of my machine these disadvantages are overcome wherefore a still further object of the invention is to provide a slag scraping machine which will save labor, time and expense in removing old material from a slag roof prior to being replaced by a new one.

With the above and other objects in view this invention consists cf the details of construction and combination of elements hereinafter set forth and then designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same I will describe its conl struction in detail referring by numerals to the accompanying drawings forming a part hereof in which:

Fig. 1 is a side elevation of the machine constructed in accordance with my invention and having a portion of the cover broken away to show some of the interior structure.

Fig. 2 is a top tion of rear end broken away and the cover removed.

Fig- 3 is a, longitudinal slide mechanism.

Fig. 4 is a transverse section on the line 4--4 of Fig. 3.

Fig. 5 is a front View the cover. y

Fig. 6 is a side View with the cover in section and illustrating the machine in a tilted position.

sectional view of the of the machine without plan view thereof having a por- Fig. 8 is a vertical cross sectional view through the machine in the region of the casters.

In carrying out my invention as herein embodied I0 represents the frame or chassis of the machine and may be composed of angle irons and/or other suitable forms or sections. Said frame or chassis includes a cross piece II at the rear end and the forward end is mounted on front wheels I2 as part of the running gear. The rear end of the machine is supported by casters I3 journalled in the cross piece I I and connected with a bar I4. While the casters are journalled in the cross piece il, said casters and cross piece and therefore the rear of the frame are vertically slidable relative to one another for a purpose to be presently described.

The cross piece I I and the bar I4 are normally urged apart by springs I5. Coacting with the bar I4 is a cam I 6 mounted on an axle I1 journalled in bearings I8 on the frame or chassis of the machine. By rotation of the cam in the proper direction to move the high portion towards the bar I 4 the rear end of the machine frame will be elevated relative to the casters and the sp1-ings I5 will be compressed. For the purpose of actuating the camv I6 in one direction, a lever I 9 is connected therewith and one end of a connecting means 20 is attached to the lever l while the other end is secured to a pull rod 2I. The pull rod can be slidably mounted on a handle 22 attached to the rear of the machine frame for conveniently propelling the machine about and steering it in the direction desired.

On the machine frame or chassis, at the forward end thereof, is mounted a cylinder 23 of any desirable cross sectional configuration, preferably rectangular, open at both ends and having an access opening 24 in one side wall. Within the cylinder 23 is reciprocatingly mounted a slide or hollow piston 25 which also has an access opening in one sidewall similar to the opening 24. For purpose of illustration I have shown an enlargement or projection 26 on the inside of said piston as a convenient means for attaching a piston rod 21 and a scraping blade shank 23 thereto.

The piston rod 21v is journalled on the crank shaft 29 mounted in suitable bearings 30 supported 'on the machine frame. The crank shaft has a large pulley 3| fixed on one end about which a belt 32 passes and said belt also-engages a pulley 33 on the shaftof a motor 34 mounted y on top of the cylinder 23. While the means for of slide mechanism.

operating the scraper is shown as an electric motor it is apparent that an internal combustion engine, a hand crank or other suitable means can be substituted for said electric motor.

As shown in Figs. 1` to 6 a dust hood 35 of bellows'formation is provided to close the forward end of the cylinder 23. Said dust hood has its rear end fixed to the forward end of the cylinder 23 while the forward end of said dust hood snugly ts'and is secured to the scraper blade shank 28' so as to reciprocate or project and retract with said shank.

In Fig. 'I is illustrated a modification of the blade reciprocating means wherein the piston is slidably mounted in a cylinder 23a having a foot 23h for securement to the machine frame or chassis. A dust hood a. is in the form of a sleeve slidably mounted on the outside of the cylinder 23a and having its outer end closed by an end wall 35h which snugly fits about the shank 28 and is secured thereto for movement therewith.

The outer portion of vthe scraper blade shank is serrated at 36 with which register the serrations 31 on a part of the scraper blade 33 to assist in holding the blade in any one of a number of adjustments. The blade is temporarily secured in any adjusted location by fastening devices 39, such as bolts and nuts, the bolts being projected through the shank l28 and slots 40 in the blade with the nuts screwed onto said bolts. This arrangement permits Athe blade to be adjusted outwardly as the blade wears away or is resharpened.

The operating mechanisms, except the pulleys vand belt, are inclosed by a removable cover d! to keep out dirt, dust or other foreign material.

In practice, when the scraper is to be used on a roof it is pulled up by a rope or raised by a block and fall or some other suitable elevating means. When the machine is located for operation the motor is started which will reciprocate the piston 25 and transmit motion to the scraper blade. By manually propelling the machine along the roof in any desired direction, the old roofing material or slag covering substance will be scraped loose for subsequent removal. As shown in Fig. 1 the scraper blade may be caused to operate in a plane parallel to the roof, where the latter is level but, as illustrated in Fig. 6, should Y the roof have a depression, indicated by the numeral t2, the pull rod 2i can be actuated to rotate the cam l5 for elevating the rear end of the machine frame on the casters i3. This will tilt the apparatus sufficiently to cause the scraper blade to reach the depressed portion of the roof.

From the foregoing it will be apparentv that I have provided a small, compact and light weight machine that will accomplish the work of several men with little eilort on the part of the operator.

Of course I do not wish to be limited to the exact details of construction herein shown and described these may be varied withinthe scope of the appended claims without departing from the spirit of my. invention.

Having described the invention what I cla-im as new and useful is :V

1. A slag scraper .comprising a frame, Wheels on which the front end of said .frame is mounted, casters on which the rear end of the. frame is mounted, said castersbeing revolvably `and slidably mounted relative tosaid frame, abar connected to said casters, manually operable means connected with `the frame forexerting pressure on the bar to elevate the rear kend of the frame for tilting the latter while said means is continuously held by an operator., a cylinder fixed on the vforward end of said frame, a piston slidably mounted in said cylinder, means to.-reciprocate Vsaid piston, a blade holding shank secured-to the Ypiston and projecting forwardlyand downwardly, a scraper blade adjustably mounted on said shank, and a dust cap connected Vto the rforward end kof the cylinder and to the blade holding shank and capable of projection and retraction with said shank.

2. .In a device of kind described, a mobile chassis, a cylinder normally open at both ends and mounted on the chassis, a hollow piston slidably mounted in said cylinder, a projection Within said piston, mechanism having a portion projecting through the rea-r open ends of the cylinder and piston and connected to said projection for reciprocating the piston, a blade shank attached to said projection and projecting through the forward ends of the piston and cylinder, a dust hood connected to the forward end of said cylinder and to the blade shank and movable with the latter to form a closure for the forward ends of the cylinder and piston, and a blade on said shank 3. The structure according to claim 2 in which the coacting surfaces of the blade and shank have transverse serrations meshing one another to assist in holding the blade in any adjusted position on the shank, and fastening means carried by the shank and projecting through slots in the blade to fasten the latter in an adjusted position.

4. In a machine of thekind described, a frame,

. wheels on which the front portion of said frame is mounted, a cylinder mounted on said frame over the wheels, a piston slidable in said cylinder, means to reciprocate said piston, a blade holding shank connected to said .piston and overhanging the front end of the frame, aI scraper blade on said shank, the combined weights of said blade and the overhanging end of the holding shank and the front parts of the machine depressing the forward end of said machine whereby it rests on a surface Aat three points defined by the wheels and blade to prevent chattering during operation, casters siidably mounted on the rear of the ma'- chine frame to hold 'the same against abnormal backward tilting, a bar connected to said casters, and manually operable means connected with the frame for exerting pressure on the bar to elevate the rear end of said frame lfor tilting the latter while said means is continuously held by an operator.

5. In a roofers slag scraper, a mobile chassis, a cylinder normally open at both ends and mounted on the chassis, a hollow piston slidably mounted in said cylinder, a projection within said piston, mechanism having a portion projecting through the rear open ends of said cylinder and piston and connected to said projection for reciprocating the piston, power means for operating the mechanism, a blade shank attached to the piston and projecting through the forward end of the cylinder, and dust-proofing means on said forward end of the cylinder to close the latter against the entrance of foreign substances there-'- through.

MICHAEL CONFORTO.

REFEREIICES CITED The following references are of record in the i'lle of this patent:

UNITED STATES PATENTS 

